Traditionally, IPTV is delivered over a broadband network and subscribers require IPTV STB to receive multicast content. Both the STB and its IP gateway must support IP multicast and IGMP. Because native IGMP cannot route beyond the first IP hop, subscriber reach is often restricted.
CDN (Content Delivery Network) for Live TV further extends the FCC feature. To enable CDN for Live TV, use the following CLI:
in the classic CLI
config>mcast-mgmt-mcast-info-plcy>video-policy>video-if extended-unicast
in the MD-CLI
configure multicast-management multicast-info-policy video-policy video-interface extended-unicast
Channel requests are triggered by an RTCP request. IPTV content is unicast to each individual subscriber using RTP over IP UDP, which:
eliminates the need to have both IP multicast support and IGMP support on end user devices
only requires subscribers to have IP connectivity. IPTV content is routed Over The Top (OTT) to individual subscribers.
supports all FCC, RET, and CDN for Live TV on the same ISA/ESA. Therefore, the ISA/ESA that supports FCC/RET for broadband IPTV multicast can be reused for CDN for Live TV.
allows OTT subscribers to use the same STB and software as the traditional broadband multicast IPTV subscribers. STB can be programmed to automatically use RTCP messages instead of IGMP, if IGMP requests are non-responsive. This allows for unified STB deployment regardless of the end subscriber type.
delivers video content using UDP with steady bit rate, which does not require network dimensioning for TCP burstiness or buffering
allows CDN for Live TV subscribers to use the FCC and RET function. CDN for Live TV uses RTCP control messages to retrieve IPTV content.